Lecture Switched Networks - Chapter 1: Introduction to Switched Networks

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Chapter 1 introduction to Switched Networks. This chapter describe the convergence of data, voice, and video in the context of switched networks; describe a switched network in a small-to-medium-sized business; explain the process of frame forwarding in a switched network; Compare a collision domain to a broadcast domain.

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Nội dung Text: Lecture Switched Networks - Chapter 1: Introduction to Switched Networks

Chapter 1: Introduction to Switched Networks Switched Networks Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 1
Chapter 1 1.0 Introduction 1.1 LAN Design 1.2 The Switched Environment 1.3 Summary Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 2
Chapter 1: Objectives  Describe the convergence of data, voice, and video in the context of switched networks.  Describe a switched network in a small-to-medium-sized business.  Explain the process of frame forwarding in a switched network.  Compare a collision domain to a broadcast domain. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 3
1.1 LAN Design Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 4
Converged Networks Growing Complexity of Networks Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 5
Converged Networks Elements of a Converged Network A converged network solution for a small-to-medium-sized business supports:  Call control - Telephone call processing, caller ID, call transfer, hold, and conference  Voice messaging  Mobility  Automated attendant Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 6
Converged Networks Borderless Network Architecture Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 7
Converged Networks Hierarchy in Borderless Switched Networks Borderless switched network design principles:  Hierarchical  Modular  Resiliency  Flexibility Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 8
Converged Networks Access, Distribution and Core Layers Core Distribution Access Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 9
Switched Networks Role of Switched Networks Switched networks incorporate the following features:  Layer 3 functionality  Quality of service  IP telephony  Security  Wireless networking  Mobility Meeting the requirements of next generation networks:  Secure  Reliable and always available  Support converged network traffic such as data, voice, video, security systems, and more Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 10
Switched Networks Form Factors Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 11
Switched Networks Multilayer Switching  Deployed in the core and distribution layers  Can build a routing table  Supports a few routing protocols  Forwards IP packets  With IOS 15.x Catalyst 2960s, can support multiple switched virtual interfaces (SVIs) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 12
Switch Features Port Density Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 13
Switch Features Forwarding Rates  How much data the switch can process per second  Switch product lines are classified by forwarding rates Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 14
Switch Features Power over Ethernet  Power over Ethernet (PoE) allows the switch to deliver power to a device over the existing Ethernet cabling.  PoE pass-through allows you to power PoE devices connected to the switch and the switch by drawing power from specific upstream switches. PoE Pass-Through PoE Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 15
Switch Features Cisco Catalyst Switch Breakdown Core and Distribution Layer Switches  Cisco Catalyst 6500 Series  Cisco Catalyst 4500E Series  Cisco Catalyst 4500-X Series  Cisco Catalyst 3750-X Series Distribution and Access Layer Switches  Cisco Catalyst 4500E Series  Cisco Catalyst 3750-X Series  Cisco Catalyst 3560-X Series Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 16
Switch Features Cisco Catalyst Switch Breakdown Access Layer Switches  Cisco Catalyst 2960 Series  Cisco Catalyst 2960 and 2960-C Series Compact Switches Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 17
1.2 The Switched Environment Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 18
Frame Forwarding Switching as a General Concept The fundamental concept of switching refers to a device making a decision based on two criteria:  Ingress port  Destination address A LAN switch maintains a table that it uses to determine how to forward traffic through the switch Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 19
Frame Forwarding Dynamically Populating a Switch MAC Address Table As the switch learns the relationship of ports to devices, it builds a table called a MAC address, or content addressable memory (CAM) table. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 20